# -*- coding: utf-8 -*-
# vim: set noet ts=4:
#
# scim-python
#
# Copyright (c) 2008-2008 Yu Yuwei <acevery@gmail.com>
#
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place, Suite 330,
# Boston, MA  02111-1307  USA
#
# $Id: $
#

import scim
from scim import IMEngine
from scim import IMEngineFactory
from scim import Property
from scim import Attribute
from scim import KeyCode
from scim import KeyMask
import scim.ascii as ascii
import XMSQLiteDB
import XMDict

from gettext import dgettext
_  = lambda a : dgettext ("scim-python", a)
N_ = lambda a : a

class Editor:
	'''Hold user inputs chars and preedit string'''
	def __init__ (self,phrase_table_index,valid_input_chars, max_key_length, database, parser = XMDict.Parse, deparser = XMDict.Deparse, max_length = 64):
		self.db = database
		self._pt = phrase_table_index
		self._parser = parser
		self._deparser = deparser
		self._max_key_len = int(max_key_length)
		self._max_length = max_length
		self._valid_input_chars = valid_input_chars
		#
		# below vals will be reset in self.clear()
		#
		# we hold this: [str,str,...]
		# self._chars: hold user input in xingma mode (valid,invalid,prevalid)
		self._chars = [[],[],[]]
		#self._t_chars: hold total input for xingma mode for input check
		self._t_chars = []
		# self._u_chars: hold user input but not manual comitted chars
		self._u_chars = []
		# self._xmkey_list: hold XingMa_Key objects transform from user input chars
		self._xmkey_list = []
		# self._strings: hold preedit strings
		self._strings = []
		# self._cursor: the caret position in preedit phrases 
		self._cursor = [0,0]
		# self._candidates: hold candidates selected from database [[now],[pre]]
		self._candidates = [[],[]]
		self._lookup_table = scim.LookupTable(6)
		# self._py_mode: whether in pinyin mode
		self._py_mode = False
		# self._zi: the last Zi commit to preedit
		self._zi = u''

	def clear (self):
		'''Remove data holded'''
		self.over_input ()
		self._t_chars = []
		self._strings = []
		self._cursor = [0,0]
		self._py_mode = False
		self._zi = u''
		self.update_candidates
	
	def is_empty (self):
		return len(self._t_chars) == 0

	def clear_input (self):
		'''
		Remove input characters held for XingMa mode,
		'''
		self._chars = [[],[],[]]
		self._xmkey_list = []
		self._lookup_table.clear()
		self._lookup_table.show_cursor(False)
		self._candidates = [[],[]]
	
	def over_input (self):
		'''
		Remove input characters held for XingMa mode,
		'''
		self.clear_input ()
		self._u_chars = []
	
	def set_parser (self, parser):
		'''change input parser'''
		self.clear ()
		self._parser = parser
		
	def add_input (self,c):
		'''add input character'''
		if len (self._t_chars) == self._max_length:
			return
		self._zi = u''
		if self._cursor[1]:
			self.split_phrase()
		if (len (self._chars[0]) == self._max_key_len and (not self._py_mode)) or ( len (self._chars[0]) == 6 and self._py_mode ) :
			self.auto_commit_to_preedit()
			self.add_input (c)
			return
		elif self._chars[1]:
			self._chars[1].append (c)
		else:
			if c in self._valid_input_chars:
				try:
					self._xmkey_list += self._parser (c)
					self._chars[0].append (c)
				except:
					self._chars[1].append (c)
			else:
				self._chars[1].append (c)
		self._t_chars.append(c)
		self.update_candidates ()

	def pop_input (self):
		'''remove and display last input char held'''
		_c =''
		if self._chars[1]:
			_c = self._chars[1].pop ()
		elif self._chars[0]:
			_c = self._chars[0].pop ()
			self._xmkey_list.pop()
			if (not self._chars[0]) and self._u_chars:
				self._chars[0] = self._u_chars.pop()
				self._chars[1] = self._chars[1][:-1]
				self._xmkey_list = self._parser (self._chars[0])
				self._strings.pop (self._cursor[0] - 1 )
				self._cursor[0] -= 1
		self._t_chars.pop()
		self.update_candidates ()
		return _c
	
	def get_input_chars (self):
		'''get characters held, valid and invalid'''
		return self._chars[0] + self._chars[1]

	def get_input_chars_string (self):
		'''Get valid input char string'''
		return u''.join(map(str,self._chars[0]))

	def get_all_input_strings (self):
		'''Get all uncommit input characters, used in English mode or direct commit'''
		u_chars = []
		for i in self._u_chars:
			u_chars += i[:]
		u_chars += self._chars[0]
		return u''.join( map(str,u_chars) )
	
	def get_index(self,key):
		'''Get the index of key in database table'''
		return self._pt.index(key)

	def split_phrase (self):
		'''Splite current phrase into two phrase'''
		_head = u''
		_end = u''
		try:
			_head = self._strings[self._cursor[0]][:self._cursor[1]]
			_end = self._strings[self._cursor[0]][self._cursor[1]:]
			self._strings.pop(self._cursor[0])
			self._strings.insert(self._cursor[0],_head)
			self._strings.insert(self._cursor[0]+1,_end)
			self._cursor[0] +=1
			self._cursor[1] = 0
		except:
			pass
	
	def remove_before_string (self):
		'''Remove string before cursor'''
		if self._cursor[1] != 0:
			self.split_phrase()
		if self._cursor[0] > 0:
			self._strings.pop(self._cursor[0]-1)
			self._cursor[0] -= 1
		else:
			pass
	
	def remove_after_string (self):
		'''Remove string after cursor'''
		if self._cursor[1] != 0:
			self.split_phrase()
		if self._cursor[0] >= len (self._strings):
			pass
		else:
			self._strings.pop(self._cursor[0])
	
	def remove_before_char (self):
		'''Remove character before cursor'''
		if self._cursor[1] > 0:
			_str = self._strings[ self._cursor[0] ]
			self._strings[ self._cursor[0] ] = _str[ : self._cursor[1]-1] + _str[ self._cursor[1] :]
			self._cursor[1] -= 1
		else:
			if self._cursor[0] == 0:
				pass
			else:
				if len ( self._strings[self._cursor[0] - 1] ) == 1:
					self.remove_before_string()
				else:
					self._strings[self._cursor[0] - 1] = self._strings[self._cursor[0] - 1][:-1]

	def remove_after_char (self):
		'''Remove character after cursor'''
		if self._cursor[1] == 0:
			if self._cursor[0] == len ( self._strings):
				pass
			else:
				if len( self._strings[ self._cursor[0] ]) == 1:
					self.remove_after_string ()
				else:
					self._strings[ self._cursor[0] ] = self._strings[ self._cursor[0] ][1:]
		else:
			if ( self._cursor[1] + 1 ) == len( self._strings[ self._cursor[0] ] ) :
				self.split_phrase ()
				self.remove_after_string ()
			else:
				string = self._strings[ self._cursor[0] ]
				self._strings[ self._cursor[0] ] = string[:self._cursor[1]] + string[ self._cursor[1] + 1 : ]

	def get_invalid_input_chars (self):
		'''get invalid characters held'''
		return self._chars[1]

	def get_invalid_input_string (self):
		'''get invalid characters in string form'''
		return u''.join (self._chars[1])
		
	def get_preedit_strings (self):
		'''Get preedit strings'''
		if self._strings:
			res = u''
			for _str in self._strings[:self._cursor[0]] + self.get_input_chars() + self._strings[self._cursor[0]:]:
				res +=  _str
			return res
		else:
			return u''.join( map( str, self.get_input_chars() ) )

	def get_caret (self):
		'''Get caret position in preedit strings'''
		_pos = 0
		if self._cursor[0] and self._strings:
			for i in range(self._cursor[0]):
				_pos += len( self._strings[i])
		_pos += self._cursor[1]
		_pos += len( self.get_input_chars() )
		return _pos
	
	def arrow_left (self):
		'''Process Arrow Left Key Event.
		Update cursor data when move caret left'''
		if self.get_preedit_strings ():
			if not( self.get_input_chars () or self._u_chars ):
				if self._cursor[1] > 0:
					self._cursor[1] -= 1
				else:
					if self._cursor[0] > 0:
						self._cursor[1] = len (self._strings[self._cursor[0]-1]) - 1
						self._cursor[0] -= 1
					else:
						self._cursor[0] = len(self._strings)
						self._cursor[1] = 0
				self.update_candidates ()
			return True
		else:
			return False
	
	def arrow_right (self):
		'''Process Arrow Right Key Event.
		Update cursor data when move caret right'''
		if self.get_preedit_strings ():
			if not( self.get_input_chars () or self._u_chars ):
				if self._cursor[1] == 0:
					if self._cursor[0] == len (self._strings):
						self._cursor[0] = 0
					else:
						self._cursor[1] += 1
				else:
					self._cursor[1] += 1
				if self._cursor[1] == len(self._strings[ self._cursor[0] ]):
					self._cursor[0] += 1
					self._cursor[1] = 0
				self.update_candidates ()
			return True
		else:
			return False

	def control_arrow_left (self):
		'''Process Control + Arrow Left Key Event.
		Update cursor data when move caret to string left'''
		if self.get_preedit_strings ():
			if not( self.get_input_chars () or self._u_chars ):
				if self._cursor[1] == 0:
					if self._cursor[0] == 0:
						self._cursor[0] = len (self._strings) - 1
					else:
						self._cursor[0] -= 1
				else:
					self._cursor[1] = 0
				self.update_candidates ()
			return True
		else:
			return False
	
	def control_arrow_right (self):
		'''Process Control + Arrow Right Key Event.
		Update cursor data when move caret to string right'''
		if self.get_preedit_strings ():
			if not( self.get_input_chars () or self._u_chars ):
				if self._cursor[1] == 0:
					if self._cursor[0] == len (self._strings):
						self._cursor[0] = 1
					else:
						self._cursor[0] += 1
				else:
					self._cursor[0] += 1
					self._cursor[1] = 0
				self.update_candidates ()
			return True
		else:
			return False
	
	def update_candidates (self):
		'''Update lookuptable'''
		if self._chars[0] == self._chars[2] and self._candidates[0]:
			# if no change in valid input char, we do not do sql enquery
			pass
		else:
			# do enquiry
			self._lookup_table.clear ()
			self._lookup_table.show_cursor (False)
			self._candidates[1] = self._candidates[0]
			if self._xmkey_list:
				# here we need to consider two parts, xingma and pinyin
				# first xingma
				if not self._py_mode:
					self._candidates[0] = self.db.select_words( self._xmkey_list )
				else:
					self._candidates[0] = self.db.select_zi( self._xmkey_list )
				self._chars[2] = self._chars[0][:]
					
			else:
				self._candidates[0] =[]
			if self._candidates[0]:
				if not self._py_mode:
					_p_index = self.get_index('phrase')
					_fkey = self.get_index('m0')
				else:
					_p_index = 7
					_fkey = 1
				for candi in  self._candidates[0]:
					_phrase = candi[_p_index]
					_xm = u''.join( map(self._deparser , candi[_fkey + len(self._xmkey_list) : _p_index ] ) )
					# further color implementation needed :)
					# here -2 is the pos of num, -1 is the pos of . 0 is the pos of string
					attrs = [scim.Attribute (-2, 1 , scim.ATTR_FOREGROUND, 0x8e2626 ), scim.Attribute (0, len(_phrase), scim.ATTR_FOREGROUND, 0x000000 ), scim.Attribute (len(_phrase), len(_xm), scim.ATTR_FOREGROUND, 0x1973a2 )]
					self._lookup_table.append_candidate ( _phrase + _xm, attrs )
					self._lookup_table.show_cursor (True)
			else:
				if self._candidates[1] and self._chars[0]:
					self._candidates[0] = self._candidates[1]
					last_input = self.pop_input ()
					self.auto_commit_to_preedit ()
					self.add_input( last_input )
					self.update_candidates()
				else:
					self._lookup_table.clear()
					self._lookup_table.show_cursor (False)
	
	def commit_to_preedit (self):
		'''Add select phrase in lookup table to preedit string'''
		if not self._py_mode:
			_p_index = self.get_index('phrase')
		else:
			_p_index = 7
		try:
			self._strings.insert(self._cursor[0], self._candidates[0][ self.get_cursor_pos() ][_p_index])
			self._cursor [0] += 1
			if self._py_mode:
				self._zi = self._candidates[0][ self.get_cursor_pos() ][_p_index]
			self.over_input ()
			self.update_candidates ()
		except:
			pass
	
	def auto_commit_to_preedit (self):
		'''Add select phrase in lookup table to preedit string'''
		if not self._py_mode:
			_p_index = self.get_index('phrase')
		else:
			_p_index = 7
		try:
			self._u_chars.append( self._chars[0][:] )
			self._strings.insert(self._cursor[0], self._candidates[0][ self.get_cursor_pos() ][_p_index])
			self._cursor [0] += 1
			self.clear_input()
			self.update_candidates ()
		except:
			pass

	def get_aux_strings (self):
		'''Get aux strings'''
		input_chars = self.get_input_chars ()
		if input_chars:
			return u''.join( map( str, input_chars ) )

		aux_string = u''
		if self._zi:
			# we have pinyin result
			xmcodes = self.db.find_zi_code(self._zi)
			aux_string = self._zi+u': '
			for xmco in xmcodes:
				aux_string += (xmco + u' ')
		#	self._zi = u''
		cstr = u''
		for _str in self._strings:
			cstr += _str
		if self.db.user_can_define_phrase:
			if len (cstr ) > 1:
				aux_string += (u'\t#: ' + self.db.parse_phrase_to_xm (cstr))
		return aux_string
	def arrow_down(self):
		'''Process Arrow Down Key Event
		Move Lookup Table cursor down'''
		res = self._lookup_table.cursor_down()
		self.update_candidates ()
		if not res and self._candidates[0]:
			return True
		return res
	
	def arrow_up(self):
		'''Process Arrow Up Key Event
		Move Lookup Table cursor up'''
		res = self._lookup_table.cursor_up()
		self.update_candidates ()
		if not res and self._candidates[0]:
			return True
		return res
	
	def page_down(self):
		'''Process Page Down Key Event
		Move Lookup Table page down'''
		res = self._lookup_table.page_down()
		self.update_candidates ()
		if not res and self._candidates[0]:
			return True
		return res
	
	def page_up(self):
		'''Process Page Up Key Event
		move Lookup Table page up'''
		res = self._lookup_table.page_up()
		self.update_candidates ()
		if not res and self._candidates[0]:
			return True
		return res
	
	def number (self, index):
		'''Select the candidates in Lookup Table
		index should start from 0'''
		self._lookup_table.set_cursor_pos_in_current_page ( index )
		if index != self._lookup_table.get_cursor_pos_in_current_page ():
			# the index given is out of range we do not commit string
			return True
		self.commit_to_preedit ()
		return True

	def alt_number (self,index):
		'''Remove the candidates in Lookup Table from user_db index should start from 0'''
		cps = self._lookup_table.get_current_page_start()
		pos = cps + index
		if  len (self._candidates[0]) > pos:
			# this index is valid
			can = self._candidates[0][pos]
			if can[-2] == 0:
				# freq of this candidate is 0, means this a user phrase
				self.db.remove_phrase (can)
				# make update_candidates do sql enquiry
				self._chars[2].pop()
				self.update_candidates ()
			return True
		else:
			return False

	def get_cursor_pos (self):
		'''get lookup table cursor position'''
		return self._lookup_table.get_cursor_pos()

	def get_lookup_table (self):
		'''Get lookup table'''
		return self._lookup_table

	def is_lt_visible (self):
		'''Check whether lookup table is visible'''
		return self._lookup_table.is_cursor_visible ()
	
	def backspace (self):
		'''Process backspace Key Event'''
		self._zi = u''
		if self.get_input_chars():
			self.pop_input ()
			return True
		elif self.get_preedit_strings ():
			self.remove_before_char ()
			return True
		else:
			return False
	
	def control_backspace (self):
		'''Process control+backspace Key Event'''
		self._zi = u''
		if self.get_input_chars():
			self.over_input ()
			return True
		elif self.get_preedit_strings ():
			self.remove_before_string ()
			return True
		else:
			return False

	def delete (self):
		'''Process delete Key Event'''
		self._zi = u''
		if self.get_input_chars():
			return True
		elif self.get_preedit_strings ():
			self.remove_after_char ()
			return True
		else:
			return False
	
	def control_delete (self):
		'''Process control+delete Key Event'''
		self._zi = u''
		if self.get_input_chars ():
			return True
		elif self.get_preedit_strings ():
			self.remove_after_string ()
			return True
		else:
			return False

	def l_shift (self):
		'''Process Left Shift Key Event as immediately commit to preedit strings'''
		if self._chars[0]:
			self.commit_to_preedit ()
			return True
		else:
			return False
	
	def r_shift (self):
		'''Proess Right Shift Key Event as changed between PinYin Mode and XingMa Mode'''
		self._zi = u''
		if self._chars[0]:
			self.commit_to_preedit ()
		self._py_mode = not (self._py_mode)
		return True

	def space (self):
		'''Process space Key Event
		return (KeyProcessResult,whethercommit,commitstring)'''
		if self._t_chars :
			# user has input sth
			self.commit_to_preedit ()
			pstr = self.get_preedit_strings ()
			self.clear()
			return (True,pstr)
		else:
			return (False,u'')

class XingMaEngine (IMEngine):
	'''The IMEngine for XingMa'''
	
	# colors
#	_phrase_color 			= 0xffffff
#	_user_phrase_color 		= 0xffffff
#	_new_phrase_color 		= 0xffffff

	# lookup table page size
	_page_size = 6

	def __init__ (self, factory, config, encoding, id, db ):
		IMEngine.__init__ (self, factory, config, encoding, id)
		self._config = config
		self._lookup_table = scim.LookupTable (XingMaEngine._page_size)
		# this is the backend sql db we need for our IME
		# we receive this db from IMEngineFactory
		#self.db = XMSQLiteDB.XMSQLiteDB( name = dbname )
		self.db = db 
		# this is the parer which parse the input string to key object
		self._parser = XMDict.Parse
		
		# 0 = english input mode
		# 1 = xingma input mode
		self._mode = 1
		# self._ime_py: True / False this IME support pinyin mode
		self._ime_py = self.db.get_ime_property ('pinyin_mode').lower() == u'true'
		self._status = self.db.get_ime_property('status_prompt').encode('utf8')
		# now we check and update the valid input characters
		self._chars = self.db.get_ime_property('valid_input_chars')
		self._valid_input_chars = []
		for _c in self._chars:
			if _c in XMDict.XingMa_List:
				self._valid_input_chars.append(_c)
		del self._chars
		self._pt = self.db.get_phrase_table_index ()
		self._ml = int(self.db.get_ime_property ('max_key_length'))
		
		# Containers we used:
		self._editor = Editor(self._pt, self._valid_input_chars, self._ml, self.db)

		# some other vals we used:
		# self._prev_key: hold the key event last time.
		self._prev_key = None
		self._double_quotation_state = False
		self._single_quotation_state = False
		# [ENmode,XMmode] we get XMmode properties from db
		self._full_width_letter = [
				False, 
				self.db.get_ime_property('def_full_width_letter').lower() == u'true'
				]
		self._full_width_punct = [
				False,
				self.db.get_ime_property('def_full_width_punct').lower() == u'true'
				]
		
		# some properties we will involved, Property is taken from scim.
		self._status_property = Property ("status", "")
		self._letter_property = Property ("full_letter", "")
		self._punct_property = Property ("full_punct", "")
		self._py_property = Property ("py_mode", "")
		#self._setup_property = Property ("setup", _("Setup"))
		self.reset ()
		

	def reset (self):
		self._editor.clear ()
		self._double_quotation_state = False
		self._single_quotation_state = False
		self._prev_key = None
		self._init_properties ()
		IMEngine.reset (self)

	def _init_properties (self):
		properties= (
			self._status_property,
			self._letter_property,
			self._punct_property,
			self._py_property 
	#		self._setup_property
			)
		self.register_properties (properties)
		self._refresh_properties ()
	
	def _refresh_properties (self):
		'''Method used to update properties'''
		# taken and modified from PinYin.py :)
		if self._mode == 1: # refresh mode
			self._status_property.label = _(self._status)
		else:
			self._status_property.label = _("EN")

		if self._full_width_letter[self._mode]:
			self._letter_property.label = ''
			self._letter_property.icon = '/usr/share/scim/icons/full-letter.png'
		else:
			self._letter_property.label = ''
			self._letter_property.icon = '/usr/share/scim/icons/half-letter.png'

		if self._full_width_punct[self._mode]:
			self._punct_property.label = ''
			self._punct_property.icon ='/usr/share/scim/icons/full-punct.png'
		else:
			self._punct_property.label = '' 
			self._punct_property.icon ='/usr/share/scim/icons/half-punct.png'
		
		if self._editor._py_mode:
			self._py_property.label = ''
			self._py_property.icon ='/usr/share/scim/icons/py-mode.png'
		
		else:
			self._py_property.label = ''
			self._py_property.icon ='/usr/share/scim/icons/xm-mode.png'

		properties = (
			self._status_property, 
			self._letter_property, 
			self._punct_property,
			self._py_property
			)
		
		for prop in properties:
			# use buildin method to update properties :)
			self.update_property (prop)
	
	def _change_mode (self):
		'''Shift input mode, XM -> EN -> XM
		'''
		self._mode = int (not self._mode)
		self.reset ()
		self._update_ui ()

	def trigger_property (self, property):
		'''Shift property'''
		if property == "status":
			self._change_mode ()
		elif property == "full_letter":
			self._full_width_letter [self._mode] = not self._full_width_letter [self._mode]
			self._refresh_properties ()
		elif property == "full_punct":
			self._full_width_punct [self._mode] = not self._full_width_punct [self._mode]
			self._refresh_properties ()
		elif property == 'py_mode' and self._ime_py:
			self._editor.r_shift ()
			self._refresh_properties ()
	#	elif property == "setup":
			# Need implementation
	#		self.start_helper ("96c07b6f-0c3d-4403-ab57-908dd9b8d513")
		# at last invoke default method 
		IMEngine.trigger_property (self, property)
	
	def _update_preedit (self):
		'''Update Preedit String in UI'''
		_str = self._editor.get_preedit_strings ()
		if _str == u'':
			self.hide_preedit_string ()
		else:
			self.show_preedit_string ()
			self.update_preedit_string (_str,[])
			self.update_preedit_caret ( self._editor.get_caret() )
			self.show_preedit_string ()
	
	def _update_aux (self):
		'''Update Aux String in UI'''
		_ic = self._editor.get_aux_strings ()
		if _ic:
			self.show_aux_string ()
			# for further implementation, we can set attrs here :)
			attrs = [ scim.Attribute(0,len(_ic),scim.ATTR_FOREGROUND,0x5540c1) ]
			self.update_aux_string (_ic,attrs)
		else:
			self.hide_aux_string ()
			self.update_aux_string (u'')

	def _update_lookup_table (self):
		'''Update Lookup Table in UI'''
		self.update_lookup_table ( self._editor.get_lookup_table() )	
		if self._editor.is_lt_visible ():
			self.show_lookup_table ()
		else:
			self.hide_lookup_table ()

	def _update_ui (self):
		'''Update User Interface'''
		self._update_preedit ()
		self._update_aux ()
		self._update_lookup_table ()
	
	def _convert_to_full_width (self, c):
		'''convert half width character to full width'''
		if c == u".":
			if self._prev_key and self._prev_key.code >= KeyCode.KEY_0 and self._prev_key.code <= KeyCode.KEY_9:
				return u"."
			else:
				return u"\u3002"
		elif c == u"\\":
			return u"\u3001"
		elif c == u"^":
			return u"\u2026\u2026"
		elif c == u"_":
			return u"\u2014\u2014"
		elif c == u"$":
			return u"\uffe5"
		elif c == u"\"":
			self._double_quotation_state = not self._double_quotation_state
			if self._double_quotation_state:
				return u"\u201c"
			else:
				return u"\u201d"
		elif c == u"'":
			self._single_quotation_state = not self._single_quotation_state
			if self._single_quotation_state:
				return u"\u2018"
			else:
				return u"\u2019"
 		elif c == u"<":
 			if not self._is_input_english ():
 				return u"\u300a"
 		elif c == u">":
 			if not self._is_input_english ():
 				return u"\u300b"
 		
		return scim.unichar_half_to_full (c)
	
	def _match_hotkey (self, key, code, mask):
		
		if key.code == code and key.mask == mask:
			if self._prev_key and key.code == self._prev_key.code and key.mask & KeyMask.ReleaseMask:
				return True
			if not key.mask & KeyMask.ReleaseMask:
				return True

		return False
	
	def process_key_event (self, key):
		'''Process Key Events
		Key Events include Key Press and Key Release,
		KeyMask means Key Pressed
		'''
		result = self._process_key_event (key)
		self._prev_key = key
		return result

	def _process_key_event (self, key):
		'''Internal method to process key event'''
		# Match mode switch hotkey
		if not self._editor._t_chars and ( self._match_hotkey (key, KeyCode.KEY_Shift_L, KeyMask.ShiftMask + KeyMask.ReleaseMask)):
			self._change_mode ()
			return True

		# Match full half letter mode switch hotkey
		if self._match_hotkey (key, KeyCode.KEY_space, KeyMask.ShiftMask):
			self.trigger_property ("full_letter")
			return True
		
		# Match full half punct mode switch hotkey
		if self._match_hotkey (key, KeyCode.KEY_period, KeyMask.ControlMask):
			self.trigger_property ("full_punct")
			return True
		
		# we ignore all hotkeys
#		if key.mask & KeyMask.AltMask:
#			return False

		# Ignore key release event
		if key.mask & KeyMask.ReleaseMask:
			return True
		
		if self._mode:
			return self._xingma_mode_process_key_event (key)
		else:
			return self._english_mode_process_key_event (key)

	def _english_mode_process_key_event (self, key):
		'''English Mode Process Key Event'''
		if key.code >= 128:
			return False
		# we ignore all hotkeys here	
		if key.mask & KeyMask.ControlMask+KeyMask.AltMask:
			return False
		
		c = unichr (key.code)
		if ascii.ispunct (key.code): # if key code is a punctation
			if self._full_width_punct[self._mode]:
				self.commit_string (self._convert_to_full_width (c))
				return True
			else:
				self.commit_string (c)
				return True
			
		if self._full_width_letter[self._mode]: # if key code is a letter or digit
			self.commit_string (self._convert_to_full_width (c))
			return True
		else:
			self.commit_string (c)
			return True
		
		# should not reach there
		return False
	
	def _xingma_mode_process_key_event (self, key):
		'''Xingma Mode Process Key Event'''
		cond_letter_translate = lambda (c): \
			self._convert_to_full_width (c) if self._full_width_letter [self._mode] else c
		cond_punct_translate = lambda (c): \
			self._convert_to_full_width (c) if self._full_width_punct [self._mode] else c

		if self._editor.is_empty ():
			# we have not input anything
			if key.code <= 127 and (not key.mask & KeyMask.AltMask + KeyMask.ControlMask):
				if ascii.ispunct (key.code):
					self.commit_string (cond_punct_translate (unichr (key.code)))
					return True
				if ascii.isdigit (key.code):
					self.commit_string (cond_letter_translate (unichr (key.code)))
					return True

		if key.code in (KeyCode.KEY_Return, KeyCode.KEY_KP_Enter):
			if self._editor.is_empty ():
				return False
			else:
				commit_string = self._editor.get_all_input_strings ()
				self._editor.clear ()
				self._update_ui ()
				self.commit_string (commit_string)
				self._refresh_properties ()
				return True
		
		elif key.code == KeyCode.KEY_Escape:
			if self._editor.is_empty ():
				return False
			else:
				self.reset ()
				self._update_ui ()
				return True
		
		elif key.code in (KeyCode.KEY_Down, KeyCode.KEY_KP_Down) :
			res = self._editor.arrow_down ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Up, KeyCode.KEY_KP_Up):
			res = self._editor.arrow_up ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Left, KeyCode.KEY_KP_Left) and key.mask & KeyMask.ControlMask:
			res = self._editor.control_arrow_left ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Right, KeyCode.KEY_KP_Right) and key.mask & KeyMask.ControlMask:
			res = self._editor.control_arrow_right ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Left, KeyCode.KEY_KP_Left):
			res = self._editor.arrow_left ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Right, KeyCode.KEY_KP_Right):
			res = self._editor.arrow_right ()
			self._update_ui ()
			return res
		
		elif key.code == KeyCode.KEY_BackSpace and key.mask & KeyMask.ControlMask:
			res = self._editor.control_backspace ()
			self._update_ui ()
			return res
		
		elif key.code == KeyCode.KEY_BackSpace:
			res = self._editor.backspace ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Delete, KeyCode.KEY_KP_Delete) and key.mask & KeyMask.ControlMask:
			res = self._editor.control_delete ()
			self._update_ui ()
			return res
		
		elif key.code in (KeyCode.KEY_Delete, KeyCode.KEY_KP_Delete):
			res = self._editor.delete ()
			self._update_ui ()
			return res

		elif key.code >= KeyCode.KEY_1 and key.code <= KeyCode.KEY_9 and self._editor._candidates[0] and key.mask & KeyMask.ControlMask:
			res = self._editor.number (key.code - KeyCode.KEY_1)
			self._update_ui ()
			return res
		elif key.code >= KeyCode.KEY_KP_1 and key.code <= KeyCode.KEY_KP_9 and self._editor._candidates[0] and key.mask & KeyMask.ControlMask:
			res = self._editor.number (key.code - KeyCode.KEY_KP_1)
			self._update_ui ()
			return res

		elif key.code >= KeyCode.KEY_1 and key.code <= KeyCode.KEY_9 and self._editor._candidates[0] and key.mask & KeyMask.AltMask:
			res = self._editor.alt_number (key.code - KeyCode.KEY_1)
			self._update_ui ()
			return res
		elif key.code >= KeyCode.KEY_KP_1 and key.code <= KeyCode.KEY_KP_9 and self._editor._candidates[0] and key.mask & KeyMask.AltMask:
			res = self._editor.alt_number (key.code - KeyCode.KEY_KP_1)
			self._update_ui ()
			return res

		elif key.code >= KeyCode.KEY_1 and key.code <= KeyCode.KEY_9 and self._editor._candidates[0]:
			res = self._editor.number (key.code - KeyCode.KEY_1)
			if res:
				commit_string = self._editor.get_preedit_strings ()
				self._editor.clear ()
				self.commit_string (commit_string)
				# modify freq info
				self.db.check_phrase (commit_string)
				self._refresh_properties ()
			self._update_ui ()
			return res
		elif key.code >= KeyCode.KEY_KP_1 and key.code <= KeyCode.KEY_KP_9 and self._editor._candidates[0]:
			res = self._editor.number (key.code - KeyCode.KEY_KP_1)
			if res:
				commit_string = self._editor.get_preedit_strings ()
				self._editor.clear ()
				self.commit_string (commit_string)
				self.db.check_phrase (commit_string)
				self._refresh_properties ()
			self._update_ui ()
			return res

		elif key.code == KeyCode.KEY_Shift_R and (not key.mask & KeyMask.ControlMask) and self._ime_py:
			res = self._editor.r_shift ()
			self._refresh_properties ()
			self._update_ui ()
			return res
		
		elif key.code in ( KeyCode.KEY_Shift_L, KeyCode.KEY_Shift_R) :
			res = self._editor.l_shift ()
			self._update_ui ()
			return res

		elif key.code in (KeyCode.KEY_KP_Space, KeyCode.KEY_space):
			sp_res = self._editor.space ()
			self._update_ui ()
			#return (KeyProcessResult,whethercommit,commitstring)
			if sp_res[0]:
				self.commit_string (sp_res[1])
				self.db.check_phrase (sp_res[1])
				self._refresh_properties ()
			else:
				self.commit_string (cond_letter_translate (u" "))
			return True
		# now we ignore all else hotkeys
		elif key.mask & KeyMask.ControlMask+KeyMask.AltMask:
			return False

		elif key.mask & KeyMask.AltMask:
			return False

		elif unichr(key.code) in self._valid_input_chars:
			self._editor.add_input ( unichr(key.code) )
			self._update_ui ()
			return True
		
		elif key.code in (KeyCode.KEY_equal, KeyCode.KEY_Page_Down, KeyCode.KEY_KP_Page_Down) and self._editor._candidates[0]:
			res = self._editor.page_down()
			self._update_ui ()
			return res

		elif key.code in (KeyCode.KEY_minus, KeyCode.KEY_Page_Up, KeyCode.KEY_KP_Page_Up) and self._editor._candidates[0]:
			res = self._editor.page_up ()
			self._update_ui ()
			return res
		
		elif key.code <= 127:
			self._editor.commit_to_preedit ()
			commit_string = self._editor.get_preedit_strings ()
			self._editor.clear ()
			self._refresh_properties ()
			self._update_ui ()
			if ascii.ispunct (key.code):
				self.commit_string ( commit_string + cond_punct_translate (unichr (key.code)))
			else:
				self.commit_string ( commit_string + cond_letter_translate (unichr (key.code)))
			return True
		return False
	
	# below for initial test
	def focus_in (self):
		self._init_properties ()
		IMEngine.focus_in (self)
		self._update_ui ()
	
	def focus_out (self):
		IMEngine.focus_out (self)

	def lookup_table_page_up (self):
		if self._editor.page_up ():
			self._update_lookup_table ()
			return True
		
		IMEngine.lookup_table_page_up (self)
		return True

	def lookup_table_page_down (self):
		if self._editor.page_down ():
			self._update_lookup_table ()
			return True
		IMEngine.lookup_table_page_down (self)
		return False
	
	def reload_config (self, config):
		self._lookup_table.set_page_size (XingMaEngine._page_size)
		self.focus_in ()
	
class Factory (IMEngineFactory):
	"""XingMa IM Engine Factory"""
	def __init__ (self, config, db):
		import os.path
		import locale
		IMEngineFactory.__init__ (self, config)
		# this is the backend sql db we need for our IME
		# we need get lots of IME property from this db :)
		#self.db = XMSQLiteDB.XMSQLiteDB( name = database )
		
		udb = os.path.basename(db).replace('.db','-user.db') 
		self.db = XMSQLiteDB.XMSQLiteDB( name = db,user_db = udb )
		self.dbname = db
		ulocale = locale.getdefaultlocale ()[0].lower()
		self.name 	=  self.db.get_ime_property ('name.%s' % ulocale) 
		if not self.name:
			self.name 		= _( self.db.get_ime_property ('name') )
		self.uuid 		= self.db.get_ime_property ('uuid')
		self.authors	= self.db.get_ime_property ('author')
		self.icon_file 	= self.db.get_ime_property ('icon')
		self.credits 	= self.db.get_ime_property ('credit')
		self.help		= _(u"Help For Python XingMa\n\tPlease read http://code.google.com/p/scim-python/wiki/XingMaUserGuide")

		# init factory
		self._config	= config
		self.set_languages ('zh')# self.db.get_ime_property ('languages') )
#		self.reload_config (config)
		self.db.db.commit()

	def create_instance (self, encoding, id):
		engine =  XingMaEngine (self, self._config, encoding, id, self.db)
		return engine

	def reload_config (self, config):
		pass
#		XingMaEngine._page_size = \
#			config.read ("/IMEngine/Python/XingMa/PageSize", 5)
#		if XingMaEngine._page_size < 1 or XingMaEngine._page_size > 9:
#			XingMaEngine._page_size = 5
		
#		XingMaEngine._phrase_color = \
#			config.read ("/IMEngine/Python/XingMa/PhraseColor", XingMaEngine._phrase_color)
#		XingMaEngine._new_phrase_color = \
#			config.read ("/IMEngine/Python/XingMa/NewPhraseColor", XingMaEngine._new_phrase_color)
#		XingMaEngine._user_phrase_color = \
#			config.read ("/IMEngine/Python/XingMa/UserPhraseColor", XingMaEngine._user_phrase_color)

